windows that are smaller ?

Hi Every one Just had 7 windows a front door and french doors fitted the problem is the french doors catch on the sill and also the front door and all windows are to small for the openings and moved forward. I have payed a independent servay and he condemed all the work i have not been able to contact the company involved and when i do the boss is out. What can i do! I need to remove these windows to render internally and fit better fitting(Sized) windows